新安煤矿回风石门软岩巷道恒阻大变形耦合支护对策研究  

RESEARCH ON COUNTERMEASURE OF CONSTANT RESISTANCE AND LARGE DEFORMATION COUPLING SUPPORT OF RETURN AIR COURSE SOFT ROCK ROADWAY IN XIN'AN COAL MINE

作　　者：孙晓明[1,2] 王冬[1,2] 杨军[1,2] 徐慧臣 刘宗权[1,2] 陈峰[1,2] 

机构地区：[1]中国矿业大学深部岩土力学与地下工程国家重点实验室,北京100083 [2]中国矿业大学力学与建筑T程学院,北京100083

出　　处：《岩石力学与工程学报》2014年第A02期4129-4138,共10页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金面上项目(51374214);国家自然科学基金重点项目(51134005);国家自然科学基金青年科学基金项目(51304210)

摘　　要：为了解决新安煤矿+535 m回风石门软岩巷道出现的严重底臌、折帮和顶沉等非线性大变形破坏现象,采用现场工程地质力学分析、室内物理力学性质研究与三维数值模拟等研究手段,对新安煤矿回风石门软岩巷道变形破坏机制进行研究,确定变形力学机制并对其进行转化,提出恒阻大变形锚杆+金属网+底角锚管+钢纤维混凝土耦合支护设计方案,并成功应用于该矿。实践证明:以恒阻大变形锚杆为核心的耦合支护技术能够有效转化变形力学机制,安全吸收岩体中积聚的变形能,有效地阻断底臌塑性滑移作用力,从而充分保证巷道的整体稳定性。To solve the destruction phenomena of non-linearity large deformation in the ＋535 m return air course soft rock roadway of Xinan coal mine,such as serious floor heave,side wall shrinking and roof sinking,situ engineering geomechanics analysis,indoor physical mechanic property research and three-dimensional numerical simulation were adopted. And a thorough study involving the deformation failure mechanism of the return air course soft rock roadway of Xinan coal mine was developed. The type of deformation mechanism of this soft rock roadway was confirmed and transferred successfully. The support form of constant resistance and large deformation bolt ＋ metal net ＋ floor anchor pipe ＋ steel fiber reinforced concrete was proposed and used in practice successfully in Xinan coal mine. Practice was proved that the coupling technology based on constant resistance and large deformation bolt could effectively transfer the deformation mechanism, absorb the deformation energy accumulated in surrounding rock,cut off the plastic sliding force of floor heave and ensure the total safety of the roadway.

关 键 词：采矿工程 软岩巷道 变形机制 恒阻大变形 变形力学机制 数值模拟 

分 类 号：TD353[矿业工程—矿井建设]